Mortising-machine



m m AG W (No Model.)

No. 507,571; Patented 001;. 31, 1893.

NITED STATES FFICE.

ATENT MORTISING-MACHINE.

SPECIFICATION formingpart of Letters Patent No. 507,571, dated October 31, 1893.

Application filed May 26, 1893. Serial No. 475,604. (No model.)

To all whom it may concern.-

Be it known that I, AMOS S. WAGNER, a citizen of the United States, residing at Williamsport, in the county of Lyooming and State of Pennsylvania, have invented certain new and useful Improvements in Mortising-Machines; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawing, and to the letters of reference marked thereon, which forms a part of this specification.

My invention relates to treadle mechanism for mortising machines, and is designed as an lmprovement on those devices employed to relieve the foot of the operator from the shock incident to the action of the cutting tool upon the material on the bed of the machine.

The object of my invention is to elevate the bed of the machine through the medium of stronger, more positive and durable mechanism than that heretofore employed.

To this end my invention consists in the peculiar features and combinations of parts fully described hereinafter and pointed out in the claim.

The accompanying drawing represents a side elevation partly in section and with the side of the casing removed to disclose the construction within.

The main standard is represented by the reference letter a; and 1) represents the vertically movable bed on which the work is to be placed. Attached to this bed is a vertical bed-supporting rod 0 which moves vertically in a guide-lug d fixed to the standard. This rod is attached to the bed by means of a laterally extending lug e through which the rod passes, its lower end being screw-threaded and provided with beveled gears c, spindle c" and crank c, to adjust the bed to various thicknesses of material. I

The treadle mechanism and its attachments which constitute the main features of my invention, consist of a lifting-rod f having its upper end pin-jointed or hinged to the rod 0 and its lower end to the axle of a grooved-wheel g. This wheel is forced up an incline h by a treadle '5 attached to a link j having one end connected to the under side of the treadle and the other end to the axle of the wheel. The inner end of the treadle is hinged between a pair of lugs k on the front of the standard. A series of holes Z is made in the treadle in order to regulate the amount of leverage brought to bear upon the link, and hence shorten orlengthen the stroke of the link j and movement of the wheel.

The cutting tool m and its actuating mechanismn are applied to the top of the standard and are of the usual construction.

From the construction described it will be seen that whenever the treadle is depressed as shown in dotted lines, the wheel will be forced up the incline 71., thereby lifting the rod f and hence the bed I) up to the action of the cutting tool. As soon as the pressure is removed from the treadle, the latter will through force of gravity of the bed, he lifted and restored to its normal position. When the bed is lifted and the work brought to the action of the cutting tool, the force or shock of the latter will fall upon the incline it through the medium of the supporting-rod c, lifting-rod f and the wheel g, so that no appreciable shock is felt by the foot of the operator, who is able to hold the work to the cutter with onlya slightpressure upon thetreadle.

It is evident that. instead of the wheel 9 other movable devices might be substituted to pass up the incline to lift the rod f, but a wheel is preferred, as it creates less friction and reduces power and wear. It is also evident that my invention could be varied in many ways which might suggest themselves to a skilled mechanic. Thereforel' do not limit myself to the exact construction herein shown and described, but consider myself entitled to all such variations as come within the spirit and scope of my invention.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

The combination in a mortising machine, of a reciprocating table or bed, a mortising tool co-operating therewith, arod connected to the table or bed, a roller at the free end of the rod, an inclined plane formed on the body of the machine on which the roller is adapted In testimony whereofI affix my signatnrein to operate, a treadle pivoted to the body of the presence of two Witnesses. machine, and a link or rod connecting the treadle and roller, whereby upon operating AMOS 5 the treadle, the roller will be made to travel Witnesses:

on the incline, and thereby raise or lower the J. D. BREINING, table or bed, substantially as described. W. B. JACOBY. 

